What might cause a missed period and gassy stomach in someone with PCOS who is not pregnant?

Reviewed by Yoshinori Abe, MD

Internal Medicine

A missed period combined with a gassy stomach in someone with PCOS is often linked to hormonal imbalances that disrupt both the menstrual cycle and digestion. PCOS can increase the risk of digestive issues like irritable bowel syndrome (IBS), bloating, and gut inflammation, which may explain overlapping symptoms.

Because these signs can also point to other conditions—such as thyroid disorders, pregnancy, or gastrointestinal issues—it's important to identify the underlying cause. Take a free, instant, online symptom check to better understand your symptoms and confidently navigate your next steps.

Reviewed for medical accuracy: 07/14/2026

Important Next Steps

Learn likely causes of missed periods See if your gassy stomach needs care Discover if PCOS could explain symptoms Find OTC relief for bloating now Find a doctor for PCOS care Understand home remedies for bloating Check if missed periods need evaluation

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Explanation

Polycystic ovary syndrome (PCOS) can cause missed periods because it affects hormone levels in the body. These hormone changes can also impact digestion, leading to symptoms like a gassy stomach. Research suggests that women with PCOS might experience symptoms similar to irritable bowel syndrome (IBS), which includes bloating and gas.

Possible Causes:

Hormonal Imbalance: PCOS can lead to irregular periods due to hormone changes.
Digestive Issues: Hormonal changes may affect the gut, leading to symptoms like bloating and gas, similar to IBS.

Understanding Symptoms:

Missed Periods: This is common in PCOS due to irregular hormone levels.
Gassy Stomach: Digestive issues, like bloating, can be linked to IBS, which may be more common in those with PCOS.

If these symptoms persist, you can use our free AI symptom checker to better understand what might be causing your symptoms and determine if you should speak with a healthcare provider for further evaluation and management.

(References)

Pati GK, Kar C, Narayan J, Uthansingh K, Behera M, Sahu MK, et al. (2021). Irritable Bowel Syndrome and the Menstrual Cycle - PMC. Cureus, 7883586.
Sullivan SN. (2012). Functional Abdominal Bloating with Distention - PMC. ISRN Gastroenterology, 3388350.
Foley A, Burgell R, Barrett JS, & Gibson PR. (2014). Management Strategies for Abdominal Bloating and .... Gastroenterology & Hepatology, 4991532.

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